[MS-1303] Handle failed connection screen navigation

[BurningAXE]

JIRA ticket
Will be released in: 2026.1.0

Root cause analysis (for bugfixes only)

First known affected version: since forever

• When the app is minimized and Activity destroyed, it then gets restored upon bringing the app to the foreground
• This triggers navigation to the connection screen
• The graph is not yet ready and navigation fails
• However, the ViewModel doesn't know about this and thinks connection screen is visible
• Therefore any subsequent attempts to navigate to the connection screen fail
• App is left on the capture screen with a disconnected scanner

Notable changes

• If navigation to connection screen fails, this is forwarded to the VM to reset its state

Testing guidance

• Turn on "Don't keep activities"
• Navigate to the fingerprint capture screen
• Minimize app
• Bring it back to the foreground
• Capture

Additional work checklist

• Effect on other features and security has been considered
• Design document marked as "In development" (if applicable)
• External (Gitbook) and internal (Confluence) Documentation is up to date (or ticket created)
• Test cases in Testiny are up to date (or ticket created)
• Other teams notified about the changes (if applicable)

[Copilot]

Pull request overview

This pull request fixes a bug where the app becomes stuck on the fingerprint capture screen when the activity is destroyed and restored (e.g., when "Don't keep activities" is enabled). The root cause was that navigation failures to the connection screen were not handled, leaving the ViewModel in an incorrect state that prevented subsequent reconnection attempts.

Changes:

• Added error recovery logic to reset connection screen state when navigation fails
• Implemented proper state management to allow retrying scanner reconnection
• Added comprehensive test coverage for the navigation failure scenario

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
FingerprintCaptureViewModel.kt	Added handleReconnectionNavigationFailed() method to reset the isShowingConnectionScreen flag when navigation to connection screen fails
FingerprintCaptureFragment.kt	Added exception handling in launchConnection() to call the new ViewModel method when navigation fails
FingerprintCaptureViewModelTest.kt	Added test case to verify that navigation failure resets the flag and allows subsequent reconnection attempts

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud